Bobbin



oct. 11, 1938. w. J. MCGEOUG'H 2,132,990

V BOBBIN Filed April 19, 1937 /Al 5 Z A 4 .70" 5Fl-.1f 1 1 y Zzvezor:

Patented Oct. 11, 1938 UNITED vSTATES PATENT OFFICE Bom William J. McGeough, Providence, R.. I., assignor to U S Bobbin & Shuttle Company, Manchester, N. H., a corporation of Rhode Island Application April 19, 1937, Serial No. 137,628 1` claim. (c1. 242-120) In addition to its ability to retain slippery and wiry yarns better than the usual round bobbin, a flat bobbin has certain other advantages, among them being that the yarn package Wound' on such a bobbin is more or less elliptical in cross section rather than circular, and that when placed in the shuttle with its longer transverse axis horizontal it occupies less space Vvertically for a given quantity of-yarnthus making" it possible to use an abnormally low shuttle, an advantage of real importance from the standpoint of the weaver. However, in order that this latter advantage, among others, may be fully available, it is essential that the ilat bobbin al- Ways be positioned in the shuttle with its longer transverse dimension substantiallyhorizontal, and one of the objects of the present invention is to provide a bobbin designed for cooperationl with a shuttle having bobbin-holding means, in-

cluding a clutch device, operative denitely to hold the bobbin with its longer transverseaxis horizontal.

It is always advantageous from the practical standpoint to place as much yarn as possible upon a bobbin, within the limits prescribedby the dimensions of the shuttle, in order to reduce the time lost in replenishment,Y and a further object of the invention is to provide a ilat bob` bin so designed as to permit a greater quantity of yarn to be placed on the bobbin than is usu- 40 ally possible when using a bobbin and shuttle of standard dimensions. Thus in accordance with one desirable embodiment, the present invention provides a bobbin of novel shape, in particular a iiat bobbin having an abnormally short base or butt of small diameter designed tovco-` operate with holding means of usual type but disposed rearwardly of the usual bobbin chamber. To prevent the yarn from slipping rearwardly onto the butt or the bobbin, the bobbin is preferably provided with Vashoulder at the junction of its body' and butt portions. f Y

In some weaving mills it is customary to weave yarns of both right and left twist, but care must be taken that yarn of one twist is notaccidentallysubstituted for the OtheL TQ Pl'll/Qnl 51.1011

length of the butt, 'and preferably more.

accidental substitution of the wrong kind of yarn it is contemplated that two sets ofv bobbins and shuttles may be employed, each set being especially designed for use with right or lefthand twist yarn, respectively, the bobbin-holding 5 means of a shuttle of one set being capable of holding corresponding bobbins but' not bobbins designed for use in shuttles of the other set.

YOther and further objects and advantages of the invention will be made apparent in the fol- 10 lowing more detailed descriptionv andby referenceto the accompanying drawing, wherein Fig. 1 is a' plan View of a bobbin embodying bobbin being Yshown to small scale; ,Y 15

Fig. 2 is an `edge elevation of the bobbin of Fig. 1; Y 4

Fig. 3 is` a transverse section on the line 3 3 certain features of the present invention, the

Vof Fig. 2, but to larger scale;

Fig. 4 is an end elevation of the butt end of 20 the bobbin to larger scale; y

Fig. 4 is aview similarvto Fig. 4, but showing an alternative arrangement;` g f Fig. 5 is a fragmentary diametrical section substantially on the line 5--5 of Fig. 4, butto 25 larger scale; and Fig. 6 is a fragmentary vertical section through a shuttle showing bobbin-holding means designed for cooperation with the bobbin shown in Figs. 1 to 5, the bobbin-receiving spindle being broken 3o olf and turned up to bobbin-receiving position. i Referring to Figs. 1 to 5 of the drawing, the numeral I designates the bobbingenerally, such bobbinhaving'the body or blade portion 2 and a butt portion 3. Preferably, in accordance with 35 the present invention, the butt portion 3 is abnormally short, as compared with the butt portions of standard bobbins. In accordance with a preferred construction, the overall 'length L of the bobbin shouldbe at least twelve 4times'the 40 The body portion 2 is of elongate wedge shape, taper ing from its junction with they butt Vtoward its other end and having substantially/.fiat upper4 and lowerrsurfaces 4 and 5, respectively,fwhich converge towardcthe tip of the bobbin and the relatively narrow lateraliedges 6 and 1. The flat surfaces Land 5 of the bobbin are preferably of substantially uniform width from end `to 50 end exceptnear vthe tip 'IX whereagthey may abruptly'tapenias shown at 8, so as to form a more `or less pointed end. As indicated in Fig. 3, any transverse section of the body of the bobbin Saf generally rectangular contoun although-the 55 .than the maximum width of thev lateral; edge surfaces 6 or 'I. A'butt'so dimensioned isI of part'icular value whenit'is desired to support the bobbin by means of bobbin-holding jaws disposedy nearer to the end of the shuttle than is customary, thereby to save asV much of the bobbin chamber as possible for the reception of yarn.

'The abnormally short lengths@ 'the Vtemoin*batt is alsorconducive to the same modegoflmounting `the bobbin in the shuttle.

The bobbin is provided with albor'e"Ilex-tend'-` ing forwardly from its butt end to a distance suf- Y Y .I bobbin-positioning spindle I'I is also shown, such spindlehaving a'butt-portion I8 which is discient to accommodate the usual spindle by *meansof which the bobbin ispositioned within the shuttle, it being noted, howeven-ithat by reason of the tapering or wedge-shape form of the bobbin it is not possible to'extend'this bore to as/fgreatfa distance from the butt end as is `common in .bobbinsv of the usual type. Preferably `in accordance. with the ,presentY invention this bore is purposely madeof a'rdiameter somewhat-.larger'than tha-t ofthe shuttlej'spindle withY which it is tobe used, so that the bobbin may be properly centered within the shuttle body even thoughy the spindle itself may vbe slightlyout of line.Y y I The ,rear en-d surface of the butt of the bobbin, as illustrated in Fig. 4, for example, is furnished witha `slot -IIl `substantially par-allelto theshorter transverse axis of the bobbin body, such slot constituting-"one element-of a clutch device designed to preventthe bobbin `from turning on the'l-shuttle spindle whent-he bobbin is disposed within the bobbin chamber; f i f' 1f Iit 'bedesiredto provide bobbins for use with right andV left-hand 'tWistyar-n, certain of the bobbins may be :furnished ywith-'slots I0 which, as shown in Fig. 4, are parallel tothe shorter transverse dimension of the bobbin body, While others,

k as illustrated vfor example Fig. 4a, have vtheir slots 16a disposed parallel to' the longer transverse axis ofV the bobbin body.. Thus by the use Vof proper cooperating clutch elements :in shuttles of two Ydistinct types, `it is only possible to .mount kabobbin havingrig-ht-hand twist yarns,for 'example, in operative position, -i-n thefxshuttle designed to. :hold bobbins lcarrying Vyarn of this twist.l

Preferably alyarfn retainingl"shoulder I2, ex-

Y tending peripherallyy of each of the narrow edge faces i and 1,'.is provided -at thejunction of the bobbinbody. with the butt,.so .as to prevent Yyarn woundonthe body portion Vfrom, slipping .rearwardlyonto1thebutt1portion where it might ink v ter'fere with Vtheb'obbi'n-ho'lding elements,'it being Hnoted 'that since 'thediameter of the buttV Yportion is@ greater than the maximum, width of the narrow ledge surface 6 or 1, there isi also formedaishoultlerfla (Fig. 2)' ,atthe butt endA of each oir-saidsurfaces l and 5. 7 Y As illustrated in Figs; l, 2V, fl 'and 5,'the butt 3 `is provided with two peripheral ribs Il, consisting,v for fexamplefof split-res'ilient steel rings .setV

intoV grooves the'material lof the butt. YIn lac- 'Y Ycorda-nceY `withthe present yinvention ibut two of these'ringsP-or ribs fare provided, whereas *it'has been common, heretofore to providethe bobbin butt with'three or rmore rings fforcooperation with 2,132,990 y :il:

Q the usual bobbin chamber.

complementa] recesses in the bobbin-holding jaws of the shuttle. It has been found that better results are obtainable by using two rings and a corresponding pair of recesses than byV infproper alignment with the axis of the shuttle.

i v.In Fig. 6 an end portion of a shuttle I3 is diametricallyindicated, such shuttle having a narrow-chamberM constituting an extension of Thisnarrow chamber I4 rhousesusual resilient bobbin-gripping jaws I5 eachprovided with two recesses I6 for cooperation with the rings Il ofthe bobbin. A

posed betweenthe jaw members `I5 land which is pivotal-ly mounted Aong-a transverse pin I9. The spindlel I'I is furnished withk a clutch element, for example a horizontally projecting pin 2Q designed to'cooperate with a slot'arranged like the slot Illa of the bobbin of Fig. 4a, thusto hold the bobbin definitely inzpos'ition With its longer transverse dimension horizontal. Obviously, by placing the pin.20 or its equivalent so asto lie in a vertical pla-ne, it will cooperate .with a slot or recess Such as .that shown in Fig, 4, so as to Vhold the bobbin with its longertransverse axis horizontal.

VV.In placing the bobbin-in the shuttle; the spindle I'I is swung up to the position illustrated in Fig. 2, and .the bobbin is slippedY freely onto the spindle and pushed rearwardly and Vturned until the slot or recessin itswbutt can be fitted over the pin ZIJ. When the bobbin has thus been seated on the 4spindle the latter is then `swung down onto the shuttle body and as it 'nears the horizontal position .the rings II are accurately guided to enter-the recesses I6 of the resilient gripper jaws, thus effectively holding the bobbin in alignment in theV shuttle Vregardless of any slight inaccuracy ofthe spindle-Il. Moreover, whenonce disposed in the Vbobbin chamber, the clutch elements,VV including the recess in the bobbinbutt .and the pin- 2B or its equivalent, prevent any turning of thebobbi-n relatively to the spindle soA that its proper position within the bobbin chamber is assured. v

.Since Vthe butt ofY the bobbin isk abnormally short and of small diameterit'is possible to locate it Within the .narrow chamber I4 in the end of the shuttle body and thus keep the entire length of the bobbin chamber vfor the accommodation of-thegyarn-carrying por-tion of the bobbin. It thus becomes possible to place a greater quantity of yarn,for example 10% more on the bobbin than is usually .permissible for a bobbin of given dimensions, and .thus the Atime consumed in replenishment is ,substantially reduced.

While certaindesirableembodiments of the invention :have been illustrated by way of example, it is to beA Vunderstood that VtheinventionA is not necessarily limited to these precise constructions,

v being of the kind which has -a substantially cylindrical butt portion andV an elongate, substantially wedge-shaped body portion `directly and integrally united to the butt'portion, the body portion being of substantially rectangular transverse section, those faces of the body portion which, in use, are the toprand bottom faces being substantially at and of substantially uniform width except adjacent to the tip, the edge faces being relatively Vnarrow as compared with the top and bottom faces and tapering with a smooth, substantially unbroken taper from their butt ends to the tip, the bobbin having an axial bore extending from its butt end toward its tip for the reception of a shuttle spindle, and a pair of longitudinally spaced shuttle-jaw engaging rings embracing the butt portion, the butt portion being ment by a bobbin-positioning element of a shuttle, therebyV to hold the bobbin positively with its longer transverse axis horizontal when in use.

WILLIAM J. MCGEOUGH. 

